Question

我在谷歌地图上使用GMSPolyline来显示两点之间的最短路径。此地图未正确显示用户的当前位置。

这是我的代码。让我知道我可以在我的代码中进行的更正。提前谢谢。

- (void)locationManager:(CLLocationManager *)manager
     didUpdateLocations:(NSArray *)locations
{

 /////// If it's a relatively recent event, turn off updates to save power.

    CLLocation* location = [locations lastObject];
    NSDate* eventDate = location.timestamp;
    NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];

    if (abs(howRecent) < 0.5)
    {

     /////// Update your marker on your map using location.coordinate.latitude
           //and location.coordinate.longitude);

        NSLog(@"event time=%@",eventDate);

#pragma mark start Point of Polyline Drow
 ///////////////Logitude 23.03 apvathe darek point tyathe start thay etle polyline Drow thay/////
        if (location.coordinate.longitude==23.03)
        {
            [locationManager stopUpdatingLocation];
        }


        [mypath addObject:[NSString stringWithFormat:@"%f,%f",location.coordinate.latitude,location.coordinate.longitude]];

        GMSMutablePath *path1 = [GMSMutablePath path];

        for (int i=0; i<mypath.count; i++)
        {
            //NSString *str1=mypath[i];
            NSArray* foo = [mypath[i] componentsSeparatedByString: @","];
            NSString* lat = [foo objectAtIndex: 0];
            NSString* longi = [foo objectAtIndex: 1];

           [path1 addCoordinate:CLLocationCoordinate2DMake([lat floatValue], [longi floatValue])];
        }
        GMSPolyline *rectangle = [GMSPolyline polylineWithPath:path1];
        rectangle.map = mapView_;

            marker.position = CLLocationCoordinate2DMake(location.coordinate.latitude, location.coordinate.longitude);
            marker.title = @"Gurukul Road,Ahmedabad";
            marker.snippet = @"Gujarat";
            marker.map = mapView_;

    }
}

Answer 1

你必须在纬度和经度的情况下更精确地使用％f并且根据纬度和经度的值使用此代码不准确...

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    NSLog(@"didUpdateToLocation: %@", newLocation);
    CLLocation *currentLocation = newLocation;

    if (currentLocation != nil) {
        strForCurrentLongitude= [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
        strForCurrentLatitude = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
    }
}

在此行中取Double值而不是float。

  [path1 addCoordinate:CLLocationCoordinate2DMake([lat floatValue], [longi floatValue])];

Google Map在绘制路径叠加层时未正确显示用户的当前位置

1 个答案: